Show me your corroded battery terminals!

More of a PSA than anything, go clean them and snap a pic for posterity!

 

mine aren't.

first thing i do whenever i get a new-to-me vehicle is clean the terminals, apply dielectric grease, and use the foam donuts that i think are semi-useless.

hasn't failed me yet

 

I use CRC battery terminal protector spray, it eliminates the chance of corrosion. I've been using it for over 20 years on different vehicles and never once had any corrosion. A red dye is used to verify coverage.

 

Me too.
. 20+ years using CRC and never any corrosion.

 

Same experiences with the CRC here. Good stuff. However, I started using Fluid Film instead of the CRC product back in 2020…and have had zero issues, just like the CRC. Just food for thought.

 

How often are you applying to coat? Every service interval? My terminals are in bad shape

 

Terminal corrosion is usually caused by acid seepage that comes out from underneath the vent caps where they are pressed onto the case (common on flooded (or FLA) type batteries). The acid gets all over the top of the battery and eventually it migrates over to the terminals and 'boom' you have the green fuzzies.

Any time I get a new FLA battery, what I always do is pop the vent caps off and wrap each of the plugs a couple times with teflon plumbers thread-seal tape, then shove them firmly back on. This stops the seepage (and so stops the corrosion). Just be careful you don't actually block the vents with the tape.

 

I apply the CRC about twicw a year.